Antenna



FIG. 1 is a top plan view of an antenna, showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is side elevation view thereof;

FIG. 5 is a side elevation view thereof;

FIG. 6 is a top perspective view thereof;

FIG. 6A is an enlarged view of circle 6A of FIG. 6; and,

FIG. 6B is an enlarged view of circle 6B of FIG. 6.

The broken line in the figure drawings represents unclaimed environment only and forms no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 